US3230274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of linear polypeptides
Assignee: Merck and Co Inc
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Filing: 1960-12-30
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Granted: 1966-01-18
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Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 John D Garber
- 👤 Frederick M Meigs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:45
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN THE PROCESS FOR THE POLYMERIZATION OF A MIXTURE OF OPTICALLY ACTIVE FORMS OF THE N-CARBOXY ANHYDRIDE OF A GLUTAMATE, SAID MIXTURE COMPRISING X PERCENT OF THE DEXTROROTATORY FORM OF SAID GLUTAMATE AND (100-X) PERCENT OF THE LEVOROTATORY FORM OF SAID GLUTAMATE WHEREIN X IS AN INTEGER FROM 20 UP TO 80, THE IMPROVEMENT WHICH COMPRISES CATALYZING SAID POLYMERIZATION WITH AN ADEQUATE QUANTITY OF A COMPOSITION COMPRISING A POLYMER CONSISTING OF REPEATING MONOMER UNITS OF THE LEVOROTATORY FORM OF SAID FLUTAMATE AND A POLYMER CONSISTING OF REPEATING MONOMER UNITS OF THE DEXTROROTATORY FORM OF SAID GLUTA MATE, SAID COMPOSITION HAVING A RATIO OF DEXTROROTATORY POLYMER TO LEVOROTATORY POLYMER OF FROM 1:4 TO 4:1.
Claim 2
Dependent Claim
113 words
IN THE PROCESS FOR THE POLYMERIZATION OF A MIXTURE OF OPTICALLY ACTIVE FORMS OF THE N-CARBOXY ANHYDRIDE OF A GLUTAMATE, SAID MIXTURE COMPRISING X PERCENT OF THE DEXTROROTATORY FORM OF SAID GLUTAMATE AND (100-X) PERCENT OF THE LEVOROTATORY FORM OF SAID GLUTAMATE WHEREIN X IS AN INTEGER FROM 20 UP TO 80, THE IMPROVEMENT WHICH COMPRISES CATALYZING SAID POLYMERIZATION WITH AN ADEQUATE QUANTITY OF A COMPOSITION COMPRISING A POLYMER CONSISTING OF REPEATING MONOMER UNITS OF THE LEVOROTATORY FORM OF SAID FLUTAMATE AND A POLYMER CONSISTING OF REPEATING MONOMER UNITS OF THE DEXTROROTATORY FORM OF SAID GLUTA MATE, SAID COMPOSITION HAVING A RATIO OF DEXTROROTATORY POLYMER TO LEVOROTATORY POLYMER OF FROM 1:4 TO 4:1.
References Cited (Backward Citations)
US3089749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |